SAT Lines, angles, and triangles Question

In triangle FGH and triangle KLM, the measures of angles G and L are each $30^{\circ }$ . The lengths of GH and LM are each 34 centimeters, and $\frac{GH}{GF}=\frac{LM}{LK}$ : Which additional piece of information would be necessary to prove that triangle FGH is congruent to triangle KLM?